A set of 4 practical books for improving softball skills. - Title: Umakunaru Softball (Become a Better Softball Player) - Author: Tadashi Yoshimura - Variation: Breaking Ball Bible - Set Contents: 4-book set These books have been stored on a bookshelf and show signs of age, such as yellowing and scuffing on the corners. - As these are home-stored and have been inspected by an amateur, please forgive any oversight of minor scratches, scuffs, or dirt. Please check the images and purchase only if you understand that these are used books.